ST. JOHNSBURY — A Vermont man charged along with his wife in the killing of a St. Johnsbury teacher is asking a judge to exclude a detailed confession he gave police from his upcoming trial, claiming he didn’t understand what he was doing when he waived his right to silence.

The attorney for Allen Prue made the arguments in papers asking a judge to suppress all statements Prue made to police in March 2012 in the days after Melissa Jenkins was abducted and killed.

Defense Attorney Robert Katims argued that Prue was deceived into waiving his right to silence.

“A reasonable person would not conclude that further questioning was to take place, let alone hours of interrogation,” said the motion.